Activating and optimizing activity of CdS@g-C3N4 heterojunction for photocatalytic hydrogen evolution through the synergistic effect of phosphorus doping and defects

Gao, Haijun; Zhang, Shouwei; Xu, Jinzhang; Dou, Yi; Zhou, Juntian; Zhou, Ru

doi:10.1016/j.jallcom.2020.155201

Cited by 24 publications

(4 citation statements)

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“…The staggered band arrangement in CdS/g-C 3 N 4 facilitates efficient charge separation and migration. The transfer of photogenerated electrons from the CB of g-C 3 N 4 to the VB of CdS and their recombination with holes rapidly occurs [42]. This results in the accumulation of electrons in the CB of CdS, which exhibits a stronger reduction ability that drives the conversion of H 2 O to H 2 .…”

Section: Photocatalytic Hydrogen Evolution Reaction Mechanismmentioning

confidence: 99%

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

Niu,

Shen,

Guo

et al. 2023

Molecules

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This study focuses on the development of heterojunction photocatalysts for the efficient utilization of solar energy to address the energy crisis and reduce environmental pollution. Cadmium sulfide (CdS)/graphite-type carbon nitride (g-C3N4) nanocomposites were synthesized using a hydrothermal method, and their photoelectrochemical properties and photocatalytic performance for hydrogen evolution reaction (HER) were characterized. Scanning electron microscope images showed the intimate interface and caviar-like nanoheterojunction of the CdS nanoparticles on g-C3N4 nanospheres, suggesting their potential involvement in the photocatalytic process. Electrochemical and spectroscopic analyses were conducted to confirm the roles of CdS in the nanoheterojunction. The results showed that 10 wt% CdS/g-C3N4 nanospheres exhibited higher photocatalytic activity than pure g-C3N4 under visible light irradiation. A HER rate of 655.5 μmol/g/h was achieved after three photocatalytic cycles, signifying good photocatalytic stability. The synergistic effect of the Z-scheme heterojunction formed by g-C3N4 and CdS was identified as the main factor responsible for the enhanced photocatalytic performance and stability. The interface engineering effect of CdS/g-C3N4 facilitated the separation of photogenerated electrons and holes. This study provides insights into the design and fabrication of efficient HER photocatalysts.

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Section: Photocatalytic Hydrogen Evolution Reaction Mechanismmentioning

confidence: 99%

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

Niu,

Shen,

Guo

et al. 2023

Molecules

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“…[ 140 ] A core–shell heterojunction was formed by coating CdS nanoparticles on a P‐doped g‐C 3 N 4 membrane. [ 141 ] There are many kinds of metal sulfides—such as NiS 2 , CoS, ZnS, and Ag 2 S—that have been used to construct g‐C 3 N 4 ‐based heterojunctions to improve the photocatalytic activity.…”

Section: G‐c3n4‐based Heterojunction Photocatalyst and Its Enhancemen...mentioning

confidence: 99%

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Yang

Sun

et al. 2021

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Rhodamine B (RhB), and methyl orange (MO), are highly toxic and can directly negatively affect the ecosystem and human health through water circulation. Pathogens, such as fungi and bacteria, can disrupt aquatic ecosystems and are closely linked to the incidence of epidemics. [2][3][4][5][6] In developing countries, it is estimated that about 80% of diseases are caused by water-borne pathogens. The abuse of antibiotics has led to their accumulation in the environment, which have given rise to antibiotic-resistant bacteria, and ultimately led to incurable infections that have increased death rates around the world; [7,8] therefore, the effective treatment of organic dye, pathogen, and antibiotic pollutants is a major environmental remediation task.At present, photocatalysis technology can convert solar energy into electric energy, chemical energy, etc., so that solar energy can be directly applied to environmental catalysis, energy catalysis, organic catalysis, sensing, biological imaging, electrochemical energy storage, and other fields. [9] It is considered one of the sustainability strategies to address future environmental crises. [10][11][12] The development of photocatalytic materials determines the progress in photocatalytic technologies. In 1972, Fujishima and Honda [13] used a TiO 2 -modified electrode to decompose water by direct photocatalysis using UV light, which was a milestone that initiated the development of photocatalytic materials. Then, Carey et al. [14] used TiO 2 powder to degrade organic pollutants, which further stimulated researchers' interest in photocatalytic materials. Since then, the development, modification, application, and catalytic mechanism of semiconductor photocatalytic materials represented by TiO 2 have made considerable progress. As research in this field progressed, it was found that the performance of photocatalytic materials mainly depends on the light absorption and electronhole separation efficiency of the photocatalyst; however, due to their wide bandgap, traditional TiO 2 photocatalysts can only use UV light with wavelengths below 387 nm, which account for 5% of the solar energy. To realize the maximum solar energy efficiency, researchers have made many attempts to modify TiO 2 -based photocatalysts. Although the spectral response range and the availability of solar energy have been improved slightly, there are still problems, such as high costs and heavy metal pollution; therefore, a popular research direction has Emerging photocatalytic technology promises to provide an effective solution to the global energy crisis and environmental pollution. Graphite carbon nitride (g-C 3 N 4 ) has gained extensive attention in the scientific community due to its excellent physical and chemical properties, attractive electronic band structure, and low cost. In this paper, research progress in design strategies for g-C 3 N 4 -based photocatalysts in the past five years is reviewed from the perspectives of nanostructure construction, element doping, and heterostructure construction...

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“…23,24 Moreover, the hybrid photocatalysts can also improve the stability and the visible light response. 25–28 These virtues may bring the special hetero–homo-junction an outstanding photocatalytic performance. However, most of the photocatalysts are bulk materials with limited efficient charge separation rates, thus restricting the photocatalytic performances.…”

Section: Introductionmentioning

confidence: 99%

Preparation of miscible CdS and homojunction C₃N₄ hybrids for efficient photocatalytic degradation of tetracycline

et al. 2022

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Activating and optimizing activity of CdS@g-C3N4 heterojunction for photocatalytic hydrogen evolution through the synergistic effect of phosphorus doping and defects

Cited by 24 publications

References 61 publications

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Preparation of miscible CdS and homojunction C₃N₄ hybrids for efficient photocatalytic degradation of tetracycline

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Activating and optimizing activity of CdS@g-C3N4 heterojunction for photocatalytic hydrogen evolution through the synergistic effect of phosphorus doping and defects

Cited by 24 publications

References 61 publications

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

The Synergistic Effect in CdS/g-C3N4 Nanoheterojunctions Improves Visible Light Photocatalytic Performance for Hydrogen Evolution Reactions

Recent Advances in g‐C3N4‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Preparation of miscible CdS and homojunction C3N4 hybrids for efficient photocatalytic degradation of tetracycline

Contact Info

Product

Resources

About

Recent Advances in g‐C₃N₄‐Based Photocatalysts for Pollutant Degradation and Bacterial Disinfection: Design Strategies, Mechanisms, and Applications

Preparation of miscible CdS and homojunction C₃N₄ hybrids for efficient photocatalytic degradation of tetracycline